It's information security 101. Still, it will not prevent a state entity from accessing your personal devices or your online information.
Then there is the physical world with its roadbed sensors, video recorders, license plate readers, facial recognition, voice recognition, and cell phone tracking to name those methods better known.
Yep, that’s about my take on it also.
And THAT, sir, is every bit as dangerous and requires no technological breakthrough whatsoever, just a look-up table that says if they give you this hash code, use this string as the password.
I bet the "an assay" could generate such a table in an afternoon.
I'm not going to be the one to insist man can never _____ (go faster than 30 mph, fly, go to the moon, etc.), but by all means, don't let that stop you!